Abstract
Background Surgical site infections are more frequent among patients with rheumatic disease. To which extent this is related to immunosuppressive antirheumatic drugs is unclear, as is the value of discontinuing medication perioperatively.Objectives To assess the rate of surgical site infections after knee and hip-replacement in patients with inflammatory joint disease, with emphasis on periprosthetic joint infection, and to investigate the importance of medical treatment in this regard.Methods Data was collected from 494 primary elective hip- (51.4%) and knee arthroplasties along with demographic and medication data and primary outcome was surgical site infections during the first year after surgery.Results In 78% (n=385) of the cases the patient medicated with 1 to 3 disease-modifying antirheumatic drugs perioperatively. Thirty two per cent (n=157) of patients were on a TNF-alpha inhibitor perioperatively. The rate of surgical site infections was 3.8% (n=19) The rate of periprosthetic joint infection was 1.4% (n=7), all of which were knee arthroplasties. Only in 1 case of periprosthetic joint infection the patient medicated perioperatively with a TNF-alpha inhibitor.Conclusion Surgical site infections was not associated with ongoing medication with disease-modifying antirheumatic drugs. Due to low event rate this should be interpreted with caution. Routines at our centre, not stopping biologic disease-modifying antirheumatic drugs perioperatively, will be unchanged.